Barrel Bolt Finish Plain Material 18-8 Stainless Steel Barrel Head Style Truss Barrel Drive Type Tamper-Resistant Torx Thread Size 1/4 In.-20 Barrel Length 3/4 in Barrel Diameter 5/16 in Barrel Thread Depth 3/8 in Barrel Head Diameter 9/16 in Barrel Head Height 9/64 in Grip Size 2 1/2 in Made in North America Yes Material Quality Standards ASTM A582 Pack Size Small